地震地质 ›› 2000, Vol. 22 ›› Issue (s1): 2-.DOI: ISSN:0253-4967.0.2000-S1-001

• 科研简报 • 上一篇    下一篇

K-Ar法在第三纪地磁极性事件研究中的尝试

  

  1. 中国地震局地质研究所
  • 出版日期:2000-12-21 发布日期:2009-11-25
  • 基金资助:

    国家自然科学基金重点项目! (498340 0 1)资助;; 中国地震局地质研究所论著! 2 0 0 0B0 0 59

ATTEMPT ON STUDYING TERTIARY GEOMAGNETIC EVENTS BY USING K-Ar CHRONOLOGY

  • Online:2000-12-21 Published:2009-11-25

摘要:

利用K -Ar年代学方法 ,对山西左云地区第三纪火山岩剖面进行了初步精细定年。经多次试验证明 ,采用 6 0~ 80目粒级样品的测量重现性最好 ,对同一样品进行 4~ 5次测量 ,误差可控制在 3%以内。与地磁测量结果进行对比显示 ,利用K -Ar法与地磁学共同研究第三纪地磁极性事件是可行的

关键词: K-Ar年代学, 第三纪火山岩, 地磁事件

Abstract:

By K-Ar chronology, we have preliminarily attempted on careful dating for a Tertiary volcanic profile in Zuoyun, Shanxi Province. Many times of tests indicate that the results best reappeared by using 200~280μm grade samples. Measuring 4~5 times for one sample, the error may be in 3%. After comparing K-Ar results with magnetic investigation, it can be found that it is feasible to study Tertiary geomagnetic events through K-Ar dating and terrestrial magnetism.

Key words: K-Ar Chronology, Tertiary volcanic rock, Geomagnetic event